Door-switch.



J. G. PETERSON.

DOOR SWITCH.

APPLmATIoN FILED Nov. a, 1909.

970,264'. Patented sept. 13, 1910.

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nmmmnllllmlill UNITED STATES iegeirEivl? OFFICE.

vJOHAJ.\U.\ 1' G. PETERSON, OF HARTFORD, CONNECTICUT, ASSIGNOR T0 THE A RBOW ELEC- TRIC COMPANY, F HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

DOOBFSWITCH.

Specication of Letters Patent;

Patented Sept. 13, 1910.

Application led November 3, 1809. Serial No. 525,981.

the mechanisms to be actuated for opening or closing the circuits, as the case may be, the switches vbeing actuated for reversing the circuit conditions, and the push buttons being thrust outwardly, by springs when the doors are opened. In order to actuate the4 switch mechanisms, the push buttons must be forced inward a certain uniform distance, and the buttons should not project in such manner that 'the will interfere with the tight shuttin o the door, nor put undue strain upon t e hinge butts.

Owing to shrinking and swelling of the wood from which doors and door casings are made, and the sagging of doors and the settling of buildings, and to the construction of hinge butts and the irregularity with which they are set, the spaces between the faces of thelcasing jambs and the edges of the hanging stiles of doors vary considerable. As a result of thisvariation, the actions of common door switches are very .irre lar and uncertain; they ma operate satlsfactorilywhen ifst installe but after a short time, as the spaces between the jambs andstiles become greater, they fail to operate.

The object of this invention is to construct a door switch ih such manner that it will always be operated by the closing of the door, regardless of the amount of space between the meetin faces of the door stile and casing jamb. T is 4object is attained by providing such switches lwith yielding operating buttons, which project sufficiently toinsurevthe operation of the switches under all conditions, and after the switches have been actuated, contract and permit the doorn to be closed tightly. l

Figure 1 of the accompanying drawings shows'a side view' of a door switch that embodies this invention, with the receptacle cut in section in order to expose the actuating mechanism. Fig.2 shows a section of the operating push button of such a switch.

The receptacle 1, whichis shown, is of common form and material. This receptacle has the usual fastening lugs 2 and face plate 3. In the receptacle are' the necessary stationary contacts 4. These are connected with terminals 5, to which the ends of the circuit wires are designed to be connected by binding screws 6.

The actuating mechanismwhich is illustrated, is of common form and arrangement. This mechanism being well"known tothose familiar with this art, and as its details form no part of the present improvement, it is not described in detail herein. It is sufficient to point out that the mechanism is mounted upon a frame plate 7 which is fastened to the bottom of the rece tacle. Projecting from this support is an ar or 8, turning upon' which is a rocker late 9. The movab e contact 10 is4 mounte on a plate 11 that is pivoted to the support. This movable contact plate is swung back and forth for causing the movable contact to be engaged with and disengaged from the stationary contacts, by means of the ends 12 -of the actuating sprlng which is arranged in the usual manne'r, and ismade tense b form of switch a spring 13, coiled about the s indle, has one end engaged with the rocker p ate and the other end enga ed with the support in such manner that t er tension .of the spring normally holds the rocker plate in such position that the movable contact is engaged with the stationary contacts. When the push button 14 is forced in the rocker against the 'tension of the spring 13 so that the 'spring 12 throws the-movable contact out of engagement with the fixed contacts. When the push button` is free, the spring 13 forces it out andl allows the actuatin spring 12 to throw the movable contact 1nto engagement withthe stationary contacts.

he push button shpwn is 'provided with a socket. A knob or operating part 15 is arranged to moye through an opening in the late 16 that is fastened in the o .en end of t e button. On the inner end of te knob is a washer -17, and'arranged between this washer and the inner end of the socket so as to thrust the knob outwardly, is a spring 218. These parts are assembled by first se-l plate to which it is connected. is swung the socket and the washer against the end of the spring, the plate is located in the end of the socket and secured in posi'tion by peening, staking or forcing the metal of the end of the button vagainst the cover plate. The l spring 18 which is in the socket of the but-'ton is, of course, stiffer than the spring 13 which is arranged toforce the button outwardly. A door switch provided with a yielding button of this natureu is set into the casing jamb in the usual manner, When the door is shut, the hanging stile engages the knob or yielding member of the button and forces the button inward suiiciently far to cause it to actuate the switch mechanism. Then as the door continues to close, the knob is forced lagainst its spring down into the socket so that the door can shut tightly without straining any' of the parts, or putting undue strain on the` hinge butts of the door.

The invention claimed( is: I 1. In a door switch, the combination of an actuating lever, a spring for throwing said lever, a part for operating'said lever against said spring, and a spring interme diate said operating part and said lever,

said last named spring being stronger than said first named spring, whereby said lever mechanism of an electric switch, of a spring arranged to normally retain the actuating mechanism in one position, a push button having an inner section connected with the actuating mechanism, an outer section movable with relation to the inner, and a spr-ing' thrusting between the two sections .of said button.

3. The combination with the lactuating mechanism of an electric switch having a spring arranged to normally retain the actuating mechanism inone position, of a telescopic push button, said button comprising a member that is connected with said mechanism, a member telescopically connected with said first mentioned member, and a spring stiffer than the first mentioned spring arranged to4 normally holdsaid members v extended.

` JOHANN G. PETERSON. v

Witnesses: f

H. R. WILLIAMS, JOSEPHINE M. STREMPFER. 

